A:
Positive:
1 x 72181137 x 103115923 x 313831107 x 67459161 x 44833419 x 17227749 x 96372461 x 2933
Negative:
-1 x -7218113-7 x -1031159-23 x -313831-107 x -67459-161 x -44833-419 x -17227-749 x -9637-2461 x -2933
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 7,218,113, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 7,218,113 | |
| -1 | -7,218,113 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,218,113.
Example:
1 x 7,218,113 = 7,218,113
and
-1 x -7,218,113 = 7,218,113
Notice both answers equal 7,218,113
With that explanation out of the way, let's continue. Next, we take the number 7,218,113 and divide it by 2:
7,218,113 ÷ 2 = 3,609,056.5
If the quotient is a whole number, then 2 and 3,609,056.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,218,113 | |
| -1 | -7,218,113 |
Now, we try dividing 7,218,113 by 3:
7,218,113 ÷ 3 = 2,406,037.6667
If the quotient is a whole number, then 3 and 2,406,037.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,218,113 | |
| -1 | -7,218,113 |
Let's try dividing by 4:
7,218,113 ÷ 4 = 1,804,528.25
If the quotient is a whole number, then 4 and 1,804,528.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 7,218,113 | |
| -1 | 7,218,113 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 107 | 161 | 419 | 749 | 2,461 | 2,933 | 9,637 | 17,227 | 44,833 | 67,459 | 313,831 | 1,031,159 | 7,218,113 |
| -1 | -7 | -23 | -107 | -161 | -419 | -749 | -2,461 | -2,933 | -9,637 | -17,227 | -44,833 | -67,459 | -313,831 | -1,031,159 | -7,218,113 |
Here are some more numbers to try:
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